package org.hot100_2;

public class leetcode21 {
    public ListNode mergeTwoLists(ListNode list1,ListNode list2){
        ListNode dummy = new ListNode(-1);

        ListNode node = dummy;

        while (list1!=null && list2!=null){
            if (list1.val<list2.val){
                node.next=list1;
                list1=list1.next;
            }else {
                node.next=list2;
                list2=list2.next;
            }
            node=node.next;
        }

        if (list1==null){
            node.next=list2;
        }

        if (list2==null){
            node.next=list1;
        }


        return dummy.next;
    }
}
